I think u missed a chapter, new guy—I assume the one that saw his "family"(that was his older brother) get killed by the imugi(ML), I dont think so? Imugi(ML) and the guy who got killed already knew eo and also the ML already knew of the baby existence bc he obvs hunted it down bc he didn't wanna be separated
but the guy who got killed told the imugi(ML) "nah bro stop playing u cant interfere it's fate it's the boy(MC)'s destiny" and imugi said "u trippin Idc" and there since the guy who got killed kept stopping the imugi-imugi killed him WHICH led to that scene were the new guy(I assume it was the one who saw the killing) saw his brother got killed so now he vows to hunt the imugi down for killing his brother
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Which actually in the raws the did kinda successfully hunt him down but I remember they got(new guy with his LOVELY PARTNEr) got really injured but idc abt them lmao and also its quite..angsty here also for THEM and ML
I guess the new guy that wants revenge for killing his father, is the older brother of mc. As we can see a newborn baby laying in the crib but the imugi didn't kill it because he felt the bead I think. But somehow somewhere the new guy and mc got separated and thinks his whole family was killed by the imugi.
I also think the new guy's family must be related to the bad shaman that led the villagers astray.